Cement-block tamper



C. H: JOHNSON.

CEMENT BLOCK TAMPER.

APPLICATION FILED JUNE 9.191s.

1,344,230. Patented June 22, 1920.

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CEMENT BLOCK TAMPER.

APPLICATION FILED JUNE 1915.

1,344, 230 Patented June 22, 1920.

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CEMENT BLOCK TAMPER.

1 APPLICATION FILED JUNE 9. 1916.

1,344,230, Patenfed-June22,1920.

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Gumm

UNITED STATES PATENT OFFICE.

CEMENT-BLOCK TAMPER.

Specification of Letters Patent.

Patented June 22, 1920.

Application filed June 9, 1916. Serial No. 102,709.

To all whom it may concern:

Be it known that I, CHARLEY H. JOHNSON, a citizen of the United States, residing at Anoka, in the county of Anoka, State of Minnesota, have invented certain new and useful Improvements in Cement-Block Tampers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the manufacture of cement blocks and has special reference to a cement block tamper.

One important object of the invention is to improve and simplify the general construction of devices of this character.

A second important object of the invention is to provide a device of this character wherein the tamping hammers may be moved into and outof operative position by a simple lever mechanism.

A third important object of the invention is to provide a device of this character wherein the tamping hammers may be moved into and out of operative position and at the same time the driving mechanism may be thrown into and out of operative relation with such hammers so that when the hammers are thrown into operative position they will be driven, while, when the hammers are thrown out of operative position, the driving mechanism will bedisconnected therefrom so that the hammers will remain stationary.- I

A still further important object of the invention is to provide an improved means for suspending or hanging the hammer arms so that inequalities in the surface to be tamped may be allowed to exist without interfering with the proper operation of the tamping hammers.

With the above and otherobjects in view, as will be hereinafter apparent the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed. I I

In the accompanying drawings, like characters of reference indicatelike parts in the several views, and a Figure 1 is a plan view of a tamping machine constructed in accordance. with this invention;

Fig. 2 is a side elevation thereof;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4c is a Fig. 1. V

ig. 5 is a section on the line 55 of ,Fi 1.

ig. 6 is a section on line 6-6 of Fig. 4.

Fig. 7 is a section on line 77 of Fig. 2 w th the notched segment omitted so as to show the underlying links in top plan. Fig. 8' is a detail perspective view of a lifting cam and associated parts.

Fig. 9 is a perspective view of one of the clamping arms with its hanger, its stirrup and its actuating pitman.

In the embodiment of the invention herein illustrated there is disclosed a main frame 10, and extending upwardly from this main frame adjacent the front end thereof are standards llprovided with slots 12 having rabbets 13 on their inner sides. Slidable vertically in each of the slots 12 is a bearing 14 having a flanged end to fit the rabbeted portion of the standards. Mounted in the bearings 14 is a crank shaft 15, this crank shaft being provided with a multiplicity of cranks 16 as clearly shown in Fi 1.

In order to hold the crank shaft in proper raised position there is provided on each of the bearings 14 an anti-friction roller 17 which is supported on the curved cam arm of a lever 18, the latter being pivoted intermediate its ends to a projection 11' of the standard 11 at each side of the frame. At the rear of the standards 11 are provided bearings 19 and in these bearings 19 is journaled a rock shaft 20 having a rock arm 21 at each end extending in the same direction from said rock shaft and having further at each end a pair of rock arms 22 depending at substantially right angles to the first-mentioned rock arms as clearly shown in Fig. 2. Each of these rock arms 21 is connected by a link 23 with a respective lever 18 so that by section on the line Jr-4 of this means, when the rock shaft is oscillated,

the cam levers 18 will be rocked to raise the bearings 14 and carry with them the crank shaft 15. When the rock shaft is rocked in the opposite direction, the levers 18 will movelikewise in the opposite direction and consequently the bearings 14 will be lowered. At 2 1 is .a notched segment and carried by this quadrant is an operating lever 25 provided with the usual latch and having its lower end connected by a link 26 between the rock arms 22. It will now be plain that movement of the l ver 25 will oscillate the rock shaft and consequently vary the po sitions of the bearings 14. The lever being held in any desired position by means of its latch and the quadrant the height of the bearings 14 can be regulated to suit the re quired conditions of the operation. At the extreme forward end of the frame 10 and at each side is a standard 27 to which one end of the corresponding notched segment is at tached and in which standards is mounted the shaft 28. Extending below this shaft are hammer arms 29 each of which is suspended from the shaft 28 by means of a hanger 80 which is slotted to receive the shaft 28. Slidable in the slot of each hanger is the half bearing 2-31 having guide arms 31 embracing the hanger and which is held up against the lower side of the shaft 28 by means of spring These hangers 30 are located intermediate the ends of the arms 29 and connected between the upwardly directed sides of the stirrups 29 in which the rear ends of the arms are received, are the pitmen 38, the upper ends of said pitmen being connected to the crank 16. Bolted to 'the forward ends of the arms 29 so that they can readily be removed for the purpose of placing other sizes of hammers in positions are the hammers 34. These hammers may be of any size and shape desired according to the work to be operated upon.

It will now be observed that when the lever 25 is thrown into position to raise the crank shaft 15 the outer ends of the hammers will all be brought down so that when the crank shaft is rotated they may strike alternately on the surface to be tamped. In like manner when the bearings 14 are lowered the crank shaft will also be lowered and the hammers 34 will be raised out of operative position.

Mounted on the frame 10 is a platform 35 for the reception of the driving engine and this engine is connected to a shaft 36 carrying fixedly thereon a clutch element 37 which cooperates with a freely revoluble clutch element 38 mounted on said shaft and having fixed thereon a sprocket wheel 39 which is connected by a chain 40 with a sprocket wheel 41 fixed to the crank shaft 15. The clutch element 38 is slidable into engagement with the clutch element 87 by means of a lever 42 pivoted to the inner side of a bracket 43 on the frame and guided by a pin 44 projecting from the end of the crank shaft 20 and passing loosely through the lever. Fixed to the link 23 on the side of the machine adjacent the said lever 42 is a wedge member 45 which is so arranged that in one position it will engage the lever 42 and cause the same to move the member 38 into engagement with the member 37, the lever when in another position permitted by the withdrawal of the wedge member 45 serving to release said members 38 and 37. It is to be noted that the wedge member 45 is engaged with the lever 42 at the time when the crank shaft is raised so that as the crank shaft is raised and the hammers 34 brought into operative position the clutch will be thrown in and the sprocket 39 will be caused to revolve with the shaft 36 and the hammers will be driven. Conversely the disengagement of the wedge member 45 from the lever 42 occurs when the shaft is in its lowered position so that the clutch members 38 and 37 will be disengaged and the hammers will cease from operation.

Thus the hammers are moved into operative position simultaneously with the clutching of the operating mechanism and conversely, the hammers are moved into inoperative position simultaneously with theunclutching of the operating mechanism.

There has thus been provided a simple and eflicient device of the kind described and for the purpose specified.

It is obvious that many minor changes may be made in the form and construction ofthe invention without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described but it is wished to include all such as properly come within the scope claimed.

What is claimed is 1. Ina tamping machine provided with oscillating hammers, operating means connected to the hammers to cause oscillation thereof, means for adjusting the position of said operating means bodily to raise and lower the arcs of oscillation of the hammers, a driving element for said operating means, and a mechanism arrangedto clutch the driving element to the operating means.

2. In a tamping machine, a frame,a crank shaft bodily movable in said frame, a second shaft carried by the frame parallel to the crank shaft, a series of hammer arms pivotally connected to the second shaft, pitmen connecting the crank shaft and said arms,

and means to move the crank shaft bodily.

3. In a tamping machine, a frame having spaced vertical guides, bearings slidably mounted in said guides, a crank shaft journalel in said bearings, a second'shaft carried by the frame parallel to the crank shaft, hammer arms pivotally connected to the second shaft, pitmcn connecting the hammer arms to the crank shaft cranks, and means to engage the bearings and raise them in the guides.

4. In a tamping machine, a frame having spaced vertical. guides, bearings slidably mounted in said guides, a crank shaft joure naled in said bearings, a second shaft carried by the frame. parallel to the, crank shaft, hammer arms pivotally connected to the second shaft, pitmen connecting the hammcr arms to the crank shaft cranks, a rock shaft journaled in said frame and provided with rock arms, cams pivoted on the frame and engaging the bearings, links connected to the cams and to certain of the rock arms, a latch lever and quadrant carried by the frame, and a link connecting the remaining rock arm with said latch lever.

5. In a tamping machine, a frame, a crank shaft bodily movable in said frame, a second shaft carried by the frame parallel to the crank shaft, a series of hammer arms pivotally connected to the second shaft, pitmen connecting the crank shaft and said arms, a driving mechanism including cooperating clutch members, and elements connected to said means and arranged to shaft, hammer arms pivotally connected to the second shaft, pitmen connecting the hammer arms to the crank shaft cranks, a driving mechanism including cooperating clutch members, and elements connected to said means and arranged to engage the clutch members as the crank shaft 1s moved.

7. In a tamping machine, a frame having spaced vertical guides, bearings slidably mounted in said guides, a crank shaft journaled in said bearings, a second shaft carried by the frame parallel to the crank shaft, hammer arms pivotally connected to the second shaft, pitmen connecting the hammer arms to the crank shaft cranks, a rock shaft journaled in said frame and provided with rock arms, cams pivoted on the frame and engaging the bearings, links connected to the cams and to certain of the rock arms, a latch lever and quadrant carried by the frame, a driving mechanism including cooperating fixed and movable clutch members, a lever arranged to operate the movable clutch member, and a cam carried by one of the rock arms and engaging the lever to move it to clutching position.

In testimony whereof I afl'ix my signature in the presence of two witnesses.

CHARLEY H. JOHNSON. Witnesses:

J. CLEMENS ERLANDER, GRACE M. ERICKSON. 

